fix: 1. fix example. 2. export read_tsc.

Author: Quincy

.github/workflows/ci.yaml

@@ -22,7 +22,11 @@ jobs:
         uses: dtolnay/rust-toolchain@stable
         with:
           toolchain: nightly
+      - name: Build example
+        run: cargo build -r --example=tsc_example --verbose
       - name: Run tests
         run: cargo test --verbose
       - name: Run bench
         run: cargo +nightly bench --verbose
+      - name: Run example
+        run: ./target/release/examples/tsc_example

examples/tsc_example.rs

@@ -5,7 +5,7 @@ use tscns::{CALIBRATE_INTERVAL_NANOS, INIT_CALIBRATE_NANOS};
 pub struct TscTime;
 
 impl TscTime {
-    pub fn now(&self) -> u64 {
+    pub fn now(&self) -> i64 {
         tscns::read_nanos()
     }
 }

src/lib.rs

@@ -1,6 +1,6 @@
 mod tscns;
 
 pub use tscns::{
-    read_nanos, calibrate, init, get_tsc_ghz, INIT_CALIBRATE_NANOS, CALIBRATE_INTERVAL_NANOS,
+    read_nanos, read_tsc, calibrate, init, get_tsc_ghz, INIT_CALIBRATE_NANOS, CALIBRATE_INTERVAL_NANOS,
 };
 

src/tscns.rs

@@ -68,8 +68,8 @@ pub fn init(init_calibrate_ns: i64, calibrate_interval_ns: i64) {
 /// println!("now ns: {}", ns);
 /// ```
 #[inline(always)]
-pub fn read_nanos() -> u64 {
-    tsc2ns(read_tsc()) as u64
+pub fn read_nanos() -> i64 {
+    tsc2ns(read_tsc())
 }
 
 
@@ -220,7 +220,7 @@ fn sync_time() -> (i64, i64) {
 
 /// Read tsc count, support x86_64 and aarch64 architecture cpu
 #[inline(always)]
-fn read_tsc() -> i64 {
+pub fn read_tsc() -> i64 {
     #[cfg(target_arch = "x86_64")]
     unsafe {
         std::arch::x86_64::_rdtsc() as i64